210001220121000 has 256 divisors, whose sum is σ = 816877474283520. Its totient is φ = 43636617120000.

The previous prime is 210001220120971. The next prime is 210001220121031. The reversal of 210001220121000 is 121022100012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 454317096 + ... + 454779095.

It is an arithmetic number, because the mean of its divisors is an integer number (3190927633920).

Almost surely, 2^{210001220121000} is an apocalyptic number.

210001220121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210001220121000 is an abundant number, since it is smaller than the sum of its proper divisors (606876254162520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210001220121000 is a wasteful number, since it uses less digits than its factorization.

210001220121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909096233 (or 909096219 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210001220121000 its reverse (121022100012), we get a palindrome (210122242221012).

The spelling of 210001220121000 in words is "two hundred ten trillion, one billion, two hundred twenty million, one hundred twenty-one thousand".